Amy Winehouse’s father has hit out, again, at the makers of an acclaimed film about his daughter, after Asif Kapadia’s Amy won the best documentary prize at Sunday night’s Oscars.

Mitch Winehouse lambasted director Kapadia for painting a “negative, spiteful and misleading” portrayal of his daughter, and hinted once again that he was working on a rival documentary, adding: “We will fix this.”

In a further tweet, he accused Kapadia of making the film out of a sense of self-interest, rather than because the film-maker cared about his daughter. “Amy will not get an Oscar though. Just Asif Kapadia,” he said. “That is what this is all about … Asif. He’s fooled everybody.”

mitch winehouse (@mitchwinehouse)

Always proud of my baby. Amy will not get an oscar though. Just Asif Kapadia. That is what this is all about...Asif. He's fooled everybody

Mitch Winehouse and Amy’s makers have been at loggerheads since the documentary’s debut at last year’s Cannes film festival. At the time, the Winehouse family released a statement claiming the film contained “misleading”, “unfounded” and “unbalanced” allegations about the singer’s relatives and management.

“We are looking to do something positive. There are so many great things in Amy’s life that were missed in that film. It was a great opportunity that Asif Kapadia had and he didn’t grab it,” said Winehouse in October. “Let’s hear something new about Amy.”

After Rylance triumphed for his portrayal of a Soviet agent in Steven Spielberg’s Bridge of Spies, Frank Stallone took to Twitter to question why his brother, the runaway pre-Oscars favourite, had not claimed the prize. “The Academy should be ashamed of themselves,” he tweeted. “It’s as clear as the nose on your face that Sly won. Mark who? It’s total Hollywood bullshit.” He then suggest Rylance should “have been embarrassed” by his victory, adding: “Mark Rylance couldn’t even comb his hair for Christ sake this is the 3rd time Sly’s gotten ripped off.”

After a period of reflection, Frank Stallone then tweeted: “I will always defend what right but I was wrong to put down Mark Rylance and I apologise. He is a fine actor but I thought Sly deserved it.”

Frank Stallone (@Stallone)

I will always defend what right but I was wrong to put down Mark Rylance and I apologize. He is a fine actor but I thought Sly deserved it

Sly himself had earlier taken to Instagram to address the controversy. “I’m very happy and please understand my brother is so emotional because he is just very protective and only wants the best for me,” he wrote. “Life is good!”